METHOD AND SYSTEM FOR DATA SHARING FOR INTERNET OF THINGSIoT MANAGEMENT IN CLOUD COMPUTING

摘要

Disclosed is a data sharing method using attribute-based encryption in a data sharing system in a cloud computing environment for IoT management, including a user terminal, a cloud server, a plurality of IoT devices, and a trust authority server. The data sharing method in the cloud computing environment for IoT management includes a setup step in which a trust authority server generates a master key (MK) and a public key (PK), and a trust authority server in a master key (MK) and a public key (PK) , The ID of each IoT apparatus and the attribute set of the IoT apparatus as inputs, and k + 2 arbitrary a, c∈Z _p^* , {r ₁ , r ₂ ,... , a key generation step of generating a secret key (SK _u ) by selecting r _k } ∈Z _p and transmitting it to the IoT apparatus, a unique value (c) selected by the trusted authority server for generating a secret key (SK _u ), and Storing the ID id _{u of the} IoT apparatus _u in the entire IoT apparatus identifier table T, and the cloud server inputs the public key PK and the attribute set W for access control from the user terminal Receiving a cipher text (CT) generated by encrypting the data (M), the IoT device requesting the cloud server access to the cipher text (CT), the cloud server public key (PK) and the IoT device Generating a partial decryption key (TK) by inputting an identifier table (T), and a partial decryption by which a cloud server generates a partial decryption result (CT ') by inputting a partial decryption key (TK) and a cipher text (CT). Step, the cloud server outputs the partial decoding result (CT ') A step of transmitting to the device, and the Internet of Things by the input secret key (SK _u) and the partial decoding result (CT ') and comprises a final decoding step of extracting the data (M).